Enable PrintTrace when SYCL UR tracing is enabled

Author: callumfare

source/ur/ur.cpp

@@ -14,10 +14,12 @@
 
 // Controls tracing UR calls from within the UR itself.
 bool PrintTrace = [] {
+  const char *UrRet = std::getenv("SYCL_UR_TRACE");
   const char *PiRet = std::getenv("SYCL_PI_TRACE");
-  const char *Trace = PiRet ? PiRet : nullptr;
+  const char *Trace = UrRet ? UrRet : (PiRet ? PiRet : nullptr);
   const int TraceValue = Trace ? std::stoi(Trace) : 0;
-  if (TraceValue == -1 || TraceValue == 2) { // Means print all traces
+  if ((PiRet && (TraceValue == -1 || TraceValue == 2)) ||
+      (UrRet && TraceValue != 0)) {
     return true;
   }
   return false;